/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package com.google.code.twiddling.core.clp;

/**
 * @author <a href="mailto:jeff.yuchang@gmail.com">Jeff Yu</a>
 *
 */
public class DefaultParameter implements Parameters {

    private final String[] args;
    
    private int pos = 0;

    private Handler<?> handler;

    public DefaultParameter(final String[] args) {       
        this.args = args;
    }

    public boolean hasMore() {
        return pos < args.length;
    }

    public String current() {
        return args[pos];
    }

    public void skip(final int n) {
        pos += n;
    }

    public String getOptionName() {
        return handler.descriptor.toString();
    }

    public String get(final int idx) throws CLParsingException {
        if (pos + idx >= args.length) {
            throw new CLParsingException(" " + this.getOptionName());
        }

        return args[pos + idx];
    }

	public Handler<?> getHandler() {
		return handler;
	}

	public void setHandler(Handler<?> handler) {
		this.handler = handler;
	}

	public String[] getArgs() {
		return args;
	}

}
